MIPS: Octeon: Clean up SMP CPU numbering.
Also number offline CPUs that could potentially be brought on-line
later.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1489/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/cavium-octeon/smp.c b/arch/mips/cavium-octeon/smp.c
index 6d99b9d..8ff2c7b 100644
--- a/arch/mips/cavium-octeon/smp.c
+++ b/arch/mips/cavium-octeon/smp.c
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 2004-2008 Cavium Networks
+ * Copyright (C) 2004-2008, 2009, 2010 Cavium Networks
*/
#include <linux/cpu.h>
#include <linux/init.h>
@@ -102,24 +102,47 @@
const int coreid = cvmx_get_core_num();
int cpus;
int id;
-
int core_mask = octeon_get_boot_coremask();
+#ifdef CONFIG_HOTPLUG_CPU
+ unsigned int num_cores = cvmx_octeon_num_cores();
+#endif
- cpus_clear(cpu_possible_map);
+ /* The present CPUs are initially just the boot cpu (CPU 0). */
+ for (id = 0; id < NR_CPUS; id++) {
+ set_cpu_possible(id, id == 0);
+ set_cpu_present(id, id == 0);
+ }
+
__cpu_number_map[coreid] = 0;
__cpu_logical_map[0] = coreid;
- cpu_set(0, cpu_possible_map);
+ /* The present CPUs get the lowest CPU numbers. */
cpus = 1;
- for (id = 0; id < 16; id++) {
+ for (id = 0; id < NR_CPUS; id++) {
if ((id != coreid) && (core_mask & (1 << id))) {
- cpu_set(cpus, cpu_possible_map);
+ set_cpu_possible(cpus, true);
+ set_cpu_present(cpus, true);
__cpu_number_map[id] = cpus;
__cpu_logical_map[cpus] = id;
cpus++;
}
}
- cpu_present_map = cpu_possible_map;
+
+#ifdef CONFIG_HOTPLUG_CPU
+ /*
+ * The possible CPUs are all those present on the chip. We
+ * will assign CPU numbers for possible cores as well. Cores
+ * are always consecutively numberd from 0.
+ */
+ for (id = 0; id < num_cores && id < NR_CPUS; id++) {
+ if (!(core_mask & (1 << id))) {
+ set_cpu_possible(cpus, true);
+ __cpu_number_map[id] = cpus;
+ __cpu_logical_map[cpus] = id;
+ cpus++;
+ }
+ }
+#endif
octeon_smp_hotplug_setup();
}